The title is all that can really be said about Mahmoud Ahmadinejad.
This is a guy who is hosting a "scientific" conference on the Holocaust. In reality, it is nothing more than state-sanctioned Holocaust denial that is drawing the attention of a number of creeps.
Ahmadinejad has made other statements that make it obvious that he is not a rational person. That's bad enough. But it gets much much worse. Ahmadinejad is President of a country seeking nuclear weapons.
A lunatic with nuclear weapons can only be described as a recipe for disaster. Particularly a country that is training terrorists and which has a history of sponsoring terrorist groups, including Hamas, Hizballah, and the Popular Front for the Liberation of Palestine - General Command.
I have to go further than the Strata-Sphere: This man is a danger to the world.